Oppo
Change App Icon Style auf Oppo
Every app icon on the home screen keeps the same rounded-square outline unless you change the global icon shape setting. On Coloros this is controlled by the Icon styles feature, not by individual app settings or a launcher app.
Open Settings ➔ Personalizations ➔ Icon styles. This screen shows previews for standard, material, pebble, and custom outlines. Tap the shape you want, then confirm with Set the Icon style.
Exit the menu by tapping a free area of the screen, as shown by Tap a Free area to exit. Coloros applies the new outline to every icon on the home screen and in the app drawer, including icons from apps that were not designed with that shape in mind.
The layout and position of your icons does not change. Only the outline and clipping mask around each icon logo change.
If the Icon styles menu does not show a custom option, your Coloros version may only support the built-in shapes. In that case, a third-party icon pack combined with a different launcher is the only way to get a fully custom shape.